with more citys being attacked i thought maybe a new city building such as a city hall where city members can drop off mats to help build and improve their city would be nice. the mayor would be able to pick up these mats to make improvements also a crystal drop off for city members but the crystal would be automatically used gor towers instead of being picked up. along with this a city could use coins to buy city perks again this would be done by the mayor. somewhat like the kingdoms but more structured toward citys.